Latch for furnace doors



W. SCHOCH.

LATCH FOR FURNACE DOORS. APPLICATION FILED ocT. 25. 1921.

1,425,904.. Patented Aug. 15,1922.

WILLIAM SCHOCH, OF BRYN MAWR, PENNSYLVANIA.

LATCH FOR FURNACE noon's. Y

Specification of Letters Patent. Patented Aug, 15, 1922 Application filed October 25, 1921. Serial No. 510,301.

To all whom it may concern.

Be it known that I, WILLIAM SoHooH, a citizen of the United States, residing at Bryn Mawr, in the county of Montgomery and State of Pennsylvania, have invented certain new and useful Improvements in Latches for Furnace Doors, of which the following is a specification.

This invention relates to latches operating by friction and gravity to prevent the accidental opening of the furnace doors of steam boilers and other similar doors; and it consists in the novel construction and combination of the arts hereinafter fully described and claimec.

In the drawings, Figure l is a front view of a boiler furnace door provided with a latch according to this invention. Fig. 2 is a side view of the same.

The frame 4 of the door is formed on or otherwise secured to the front of the boiler furnace, and the door 5 is hinge-d or pivoted to the frame by a substantially vertical pin 6 arranged at one end of the door. In order to prevent the door from being-opened accidentally and. without the employment of a predetermined amount of force, a roller 7 is provided and is journaled horizontally in a bracket 8 secured to the lower part of the frame 4 below the free end portion of the door. The roller is provided with a horizontal shaft 10 and is arranged to revolve freely.

The portion 12 of the boiler furnace door which comes in contact with the roller is inclined upwardly and outwardly, and the door is arranged so that its free end portion can slide upwardly to a slight extent. This motion is usually provided for by a little looseness in the hinged connection of the door with its frame. When the door is closed forcibly, the inclined portion 12 rides over the vertical front face of the door frame be-' low the bottom edge of the door and under its free end portion, said roller being adapted to engage with the door and retain it in its closed position. i

signature.

ILLIAM sciioon.

vertical door in testimony whereof I have affixed my 

